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一、概况肺脏与外界相通,全身血液流经肺脏,易遭受病原微生物的侵袭,导致肺部炎症,为肺部感染。肺部感染临床常见,有报告因肺部感染住院者,约占总住院人数的5%。在总人口中,居致死病因的第五位。据估计,在美国成年人每年约有15到20万人患医院获得性肺炎,在医院获得性感染中,肺部感染约占15%,仅次于泌尿道感染居第二位,但死亡率却高达25～50%,居首位。尽管已有数十种抗生素应用于临床,肺部感染的发病频率与严重后果并未稍减,仍为临床上重要问题之一。
First, an overview of the lungs and the outside world, systemic blood flow through the lungs, susceptible to the invasion of pathogenic microorganisms, leading to lung inflammation, lung infection. Common clinical symptoms of lung infection, there are reports of hospitalizations due to pulmonary infection, accounting for about 5% of the total number of inpatients. In the total population, ranking fifth in the cause of death. It is estimated that in the United States, about 150,000 to 200,000 people suffer from hospital-acquired pneumonia each year in adults in the United States. In hospital-acquired infections, lung infections account for about 15%, second only to urinary tract infections, but the mortality rate But as high as 25 ~ 50%, ranking first. Although dozens of antibiotics have been used clinically, the incidence and serious consequences of lung infections have not diminished and remain one of the most clinically important issues.